shutdown failes on laptop

I installes suse 8.2 pro on laptop (fujitsu amilo). All went nicely except laptop don't shutdown.. When it is shutting down, I get: runlevel 0 reached but computer actually don't swich off.. I can then sthut it out by click the power button, but I'd rather have it go of by its own. If I set in /boot/grub/menu.lst the 'acpi=on' the box won't start. it freezes while detecting connected devices (passes ieee 9311 and after usb it freezes... don't get the usual two dots .. after that) in my /boot/grub/menu.lst I have now: kernel (hd0,2)/boot/vmlinuz root=/dev/hda3 vga=0x317 acpi=off hdc=ide-scsi hdclun=0 splash=silent showopts Ideas? TIA, PS